We look at the division of 685754 by 45 
The aim is to understand the frequency of 45 in 685754.

Advancing to step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (8) from the dividend and append it to 6, then repeat: 68 / 45

Moving on to step 2:
45 goes into 68 1 times with a remainder of 23.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 45 from 68 leaves us with 23.
Include the next digit (5) from the dividend after 23, then repeat: 235 / 45

Step 3:
235 divided by 45 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
The remainder is 10 after subtracting 225 from 235.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 45

Advancing to step 4:
The number 45 fits into 107 2 times, leaving a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 152.0
Deduct 90 from 107 and we're left with 17.
Grab the next digit (5) from the dividend, add it to 17, then carry on: 175 / 45

Going ahead to step 5:
The number 45 fits into 175 3 times, leaving a remainder of 40.
Use 3 as the next digit of our solution. 
Result so far: 1523.0
The remainder is 40 after subtracting 135 from 175.
Bring next digit (4) of the dividend behind the 40 and repeat the process: 404 / 45

Let's proceed to step 6:
If we divide 404 by 45, we get 8 and a remainder of 44.
Write down 8 as next digit of the result. 
Result so far: 15238.0
Subtract 360 from 404 to get 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Advancing to step 7:
The number 45 fits into 440 9 times, leaving a remainder of 35.
Use 9 as the next digit of our solution. 
Result so far: 15238.9
If we take 405 away from 440, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 8:
If we divide 350 by 45, we get 7 and a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 15238.97
Deduct 315 from 350 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 9:
45 goes into 350 7 times with a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 15238.977
If we take 315 away from 350, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Our division results in 15238.977 with a remaining 0.0035.